As CentOS 7 has reached its end of life on the 30th June, the Tier-1 computing farmhas completed the upgrade of the Operating System on all user-interfaces and worker-nodes to AlmaLinux 9.
To ease the transition a singularity image, based on the old CentOS7 worker-nodes has been created to temporary run jobs into.
Keep executing jobs on CentOS7
To keep submitting jobs on CentOS7 worker nodes users can use the feature described here specifying in the submit file: +SingularityImage="cnaf-el7".
This will allow you to run your job inside a singularity image identical to CentOS7 worker-nodes.
About cnaf-el7 Singularity Image
Please note that this mechanism is meant to be temporary, we will not upgrade the singularity image with any new packages.
We strongly encourage all users to test their executables and migrate them to Alma9 as soon as possible.